Cron作业php无法加载动态库

我在

ubuntu16.04

上尝试为

Oxwall

站点正确运行cron作业。

我必须注释掉php.ini文件中的dll文件，才能使其正常工作。可能需要一些php扩展才能工作

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_mysqli.dll' - /usr/lib/php/2015101
2/php_mysqli.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_firebird.dll' - /usr/lib/php/2
0151012/php_pdo_firebird.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_mysql.dll' - /usr/lib/php/2015
1012/php_pdo_mysql.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_oci.dll' - /usr/lib/php/201510
12/php_pdo_oci.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_odbc.dll' - /usr/lib/php/20151
012/php_pdo_odbc.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_pgsql.dll' - /usr/lib/php/2015
1012/php_pdo_pgsql.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_sqlite.dll' - /usr/lib/php/201
51012/php_pdo_sqlite.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pgsql.dll' - /usr/lib/php/20151012
/php_pgsql.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  Module 'PDO' already loaded in Unknown on line 0